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C H A P T E R
2
Basic MSFC Software Configuration
This chapter provides the basic Multilayer Switch Feature Card 2 (MSFC2)
configuration information for the Cisco 7600 Optical Services Router (OSR). For
more detailed configuration information, refer to the software configuration and
command reference publications for the Cisco 7600 OSR.
For information about basic supervisor engine software configuration, see
Chapter 1, “Basic Supervisor Engine Software Configuration.”
This chapter contains these sections:
•
Configuring the MSFC2, page 2-1
•
Using the Global Configuration Mode, page 2-14
•
Verifying the Running Configuration Settings, page 2-15
•
Saving the Running Configuration Settings to NVRAM, page 2-19
•
Reviewing the Running Configuration Settings, page 2-19
•
Performing Other Configuration Tasks, page 2-21
Configuring the MSFC2
The information in this section applies only if the system does not boot
automatically on startup from a specified default Cisco IOS software image.
The MSFC2 in the Cisco 7600 OSR is administered by a command language
interpreter called the EXEC. You must boot the MSFC2 and log in to the system
before you can issue commands to the EXEC.
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To access the MSFC2 from the supervisor engine, enter the session command in
privileged mode:
Console> session 15
Trying Router-15...
Connected to Router-15.
Escape character is '^]'.
Router>
For security purposes, the IOS EXEC command line interface has two levels of
access:
•
User EXEC mode—On startup of the Cisco IOS software, the system displays
the user EXEC mode prompt:
Router>
•
Privileged EXEC mode—If you enter an enable secret password (which must
first have been saved in memory) at the user EXEC mode prompt, the system
changes to the privileged EXEC mode prompt (Router#), as follows:
Router> enable
password: xxxxxxxxx
Router#
For more information about passwords, refer to Step 4 and Step 5 in the
“Configuring Global Parameters” section on page 2-4.
You can perform a basic configuration for your Cisco 7600 OSR using either of
these methods:
•
Using the setup facility or the setup command.
At initial startup of a completely unconfigured OSR, the system
automatically defaults to the setup facility, which enables you to begin
manually configuring your router. The setup facility presents a structured,
interactive script that guides you through the process of manually configuring
your router.
You can invoke the setup facility at any time by entering the setup command
at the privileged EXEC mode prompt (Router#), which makes available to
you the same configuration script that appears automatically at initial startup
of an unconfigured router. You can enter the setup command at any time if
you need to alter some previously entered configuration information.
The setup facility is described in the “Using the setup Facility or the setup
Command” section on page 2-3.
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•
Using the global configuration mode
If you do not want to use the interactive script of the setup facility to
configure your router, you can configure your router manually using the
global configuration mode. This facility requires you to enter configuration
commands on a line-by-line basis at the console without being prompted by
a configuration script. See the “Configuring Global Parameters” section on
page 2-4 for more information.
The advantage in using the setup facility is that the system guides you through the
configuration process through an interactive script that minimizes the likelihood
of errors.
To configure the Cisco 7600 OSR to operate in your networking environment, you
will need to obtain the correct network addresses from your system administrator
or your network plan.
Using the setup Facility or the setup Command
During the initial manual configuration of the Cisco 7600 OSR, you need to
consider these parameters:
•
Global (system-wide) parameters
•
Network interface (module) parameters
You can establish these parameters using the setup facility. The setup facility
displays automatically at initial system startup. You can also enter the setup
command at any time at the privileged EXEC prompt (Router#) to activate the
setup facility.
When you enter the setup command, the configuration script displays any existing
(previously entered) system configuration defaults within square brackets [ ].
For example, during the configuration of a Packet-over-Sonet (POS) interface
using the setup facility at startup (assuming that the interface has not previously
been configured), you will see this display as you proceed through the script and
respond to queries:
Configuring interface POS4/0:
Is this interface in use?: yes
Configure IP on this interface?: yes
No default or current parameters are enclosed within square brackets [ ] in the
configuration dialog in this configuration.
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When you enter the setup command at the privileged EXEC mode prompt
(assuming that the POS interface has been previously configured and you are
being queried by the system for changes), you will see this display:
Configuring interface POS4/0:
Is this interface in use?[yes]: yes
Configure IP on this interface?[yes]: yes
The default or current parameters that apply to the interface are enclosed within
square brackets [ ].
Configuring Global Parameters
When you first enter the setup facility or enter the setup command, you are
queried by the system to configure global parameters for the OSR MSFC.
To boot the system and establish global configuration parameters, perform these
steps:
Step 1
Boot the system to display the user EXEC prompt (Router>).
After about 30 seconds, the following display appears on the console, indicating
that you have successfully booted the system:
Cisco Internetwork Operating System Software
IOS (tm) MSFC2 Software (C6MSFC2-JSV-M), Version 12.1(5b)E7, EARLY
DEPLOYMENT RELEASE SOFTWARE (fc1)
TAC Support:http://www.cisco.com/cgi-bin/ibld/view.pl?i=support
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Fri 09-Feb-01 19:28 by hqluong
Image text-base:0x30008980, data-base:0x3177A000
ROM:System Bootstrap, Version 12.1(3r)E2, RELEASE SOFTWARE (fc1)
BOOTFLASH:MSFC2 Software (C6MSFC2-BOOT-M), Version 12.1(5b)E7, EARLY
DEPLOYMENT RELEASE SOFTWARE (fc1)
cat6k-msfc uptime is 3 minutes
System returned to ROM by power-on
Running default software
cisco Cat6k-MSFC2 (R7000) processor with 491520K/32768K bytes of
memory.
Processor board ID SAD044407E3
R7000 CPU at 300Mhz, Implementation 39, Rev 2.1, 256KB L2, 1024KB L3
Cache
Last reset from power-on
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Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
1 POS controller (4 POS).
1 Virtual Ethernet/IEEE 802.3 interface(s)
4 Packet over SONET network interface(s)
509K bytes of non-volatile configuration memory.
16384K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102
Note
The first two sections of the above configuration script (containing the
banner screen and the installed hardware listing) appear only at initial
system startup. On subsequent uses of the setup command facility, the
setup script begins with the following system configuration dialog.
--- System Configuration Dialog --At any point you may enter a question mark '?' for help.
Use ctrl-c to abort configuration dialog at any prompt.
Default settings are in square brackets '[]'.
Continue with configuration dialog? [yes/no]: yes
Enter yes when queried if you want to continue with the configuration
dialog.
Note
Step 2
The examples in this section represent a continuation of the console display
for the setup facility or the setup command.
Enter yes when asked if you want to enter the initial configuration dialog and if
you want to see the current interface summary:
Would you like to enter the initial configuration dialog? [yes]: yes
First, would you like to see the current interface summary? [yes]: yes
Pressing Return in either case accepts the default response [yes].
The following sample display results from a yes response to the current interface
summary query that is entered while you are using the setup facility.
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This display shows that no interfaces have been configured:
Interface
Ethernet0
POS3/0
POS3/1
POS3/2
POS3/3
ATM4/0
IP-Address
unassigned
unassigned
unassigned
unassigned
unassigned
unassigned
OK?
YES
YES
YES
YES
YES
YES
Method
unset
unset
unset
unset
unset
unset
Status
administratively
administratively
administratively
administratively
administratively
administratively
down
down
down
down
down
down
Protocol
down
down
down
down
down
down
The following sample display results from a yes response to the current interface
summary query that is entered while you use the setup command.
This display shows that some interfaces have already been configured:
Interface
Ethernet0
POS3/0
POS3/1
POS3/2
POS3/3
ATM4/0
Step 3
IP-Address
3.3.1.1
2.1.1.1
2.1.1.2
2.1.1.3
2.1.1.4
1.1.1.2
OK?
YES
YES
YES
YES
YES
YES
Method
NVRAM
NVRAM
NVRAM
NVRAM
NVRAM
NVRAM
Status
up
up
up
up
up
up
Protocol
up
up
up
up
up
up
Select the protocols that you intend to support for your network interfaces.
For IP-only installations, you can accept the default values for most of the
questions.
A typical minimum configuration procedure using IP follows and continues
through Step 8:
Configuring global parameters:
Enter host name [Router]: Router
Step 4
Enter the enable secret password when prompted to do so:
The enable secret is a one-way cryptographic secret used
instead of the enable password when it exists.
Enter enable secret [<Use current secret>]: barney
For future use, make a note of this password.
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Step 5
Enter the enable password when prompted to do so:
The enable password is used when there is no enable secret
and when using older software and some boot images.
Enter enable password: wilma
For future use, make a note of this password.
The commands available at the user EXEC level are a subset of those available at
the privileged EXEC level. Because many privileged EXEC commands are used
to establish system parameters, you should password protect these commands to
prevent their unauthorized use.
The enable secret password functionality is available for the Cisco 7600 OSR.
You must enter the correct password to gain access to privileged-level commands.
When you are running from the ROM monitor (rommon>), the enable password
can be used, depending on your boot ROM level.
For maximum security, the enable secret and the enable password should be
different. If you use the same password for both the enable secret and enable
functions during the setup process, the system accepts it but issues a warning
indicating that you should enter a different password.
An enable secret password can contain from 1 to 25 uppercase and lowercase
alphanumeric characters; an enable password can contain any number of
uppercase and lowercase alphanumeric characters.
In either case, you cannot use a number as the first character. Spaces, however, are
valid password characters. For example, “two words” is a valid password.
Leading spaces are ignored, but trailing spaces are recognized.
Step 6
Enter the virtual terminal password when prompted to do so:
Enter virtual terminal password: bambam
For future use, make a note of this password.
Step 7
In most cases, you will use IP routing as the network layer protocol. If you specify
IP, you must also specify an interior routing protocol.
Enter yes (the default) or press Return to configure IP. Do the same to select the
Interior Gateway Routing Protocol (IGRP) as the interior routing protocol.
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Specify the IGRP autonomous system number as follows:
Configure IP? [yes]: yes
Configure IGRP routing? [yes]: yes
Your IGRP autonomous system number [1]: 199
Step 8
Enter yes or no to the following query to accept or refuse Simple Network
Management Protocol (SNMP) management:
Configure SNMP Network Management? [yes]:
Community string [public]:
Note
Step 9
SNMP is the most widely supported standard for managing networks.
SNMP provides a means to access and set configuration and run-time
parameters and to monitor and control network elements for routers
and communication servers.
Enter yes or no to the following query to accept or refuse Connectionless Network
Service (CLNS) management:
Configure CLNS? [no]: yes
CLNS router tag [area_1]:
CLNS domain [49]:
CLNS area [0001]:
CLNS station id [0027.25E9.B640]:
Note
CLNS is an Open System Interconnection (OSI) layer service that
does not require a circuit to be established before transmitting data.
On completion of this procedure, you have successfully established the router’s
global configuration parameters.
Sample Display of Global Parameters
The following sample display lists the global parameters that you entered in
Step 3 through Step 10 in the preceding section.
The display indicates the order in which the parameters and their defaults appear
on your console terminal.
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Configuring global parameters:
Enter host name: Router
Enter enable secret: barney
Enter enable password: wilma
Enter virtual terminal password: bambam
Configure IP?: yes
Configure IGRP routing?: yes
Your IGRP autonomous system number [1]: 199
Configure SNMP Network Management?: yes
Community string [public]:
Configure CLNS? [no]: yes
CLNS router tag [area_1]:
CLNS domain [49]:
CLNS area [0001]:
CLNS station id [0027.25E9.B640]:
Configuring Network Interfaces
This section contains the procedures for configuring the Layer 3 network
interfaces for the modules installed in the Cisco 7600 OSR by using the setup
facility or the setup command. After the interfaces are configured, the Cisco 7600
OSR can communicate with external networks.
To configure the Layer 3 interface parameters for the Cisco 7600 OSR, you need
this information:
•
Interface network addresses
•
Subnet masks
•
Protocols to be configured
For additional Layer 3 interface configuration information for each of the modules
installed in your Cisco 7600 OSR, refer to the Cisco 7600 Optical Services Router
Software Configuration Guide.
Note
The sample configuration dialog in this section continues the script displayed
when you used the setup facility or the setup command in establishing the
system global parameters (see the “Configuring Global Parameters” section on
page 2-4). The output shown in this section is only an example; your
configuration dialog might be different, depending on how you configure your
router.
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These sections describe how to configure the Layer 3 interfaces on the modules
installed in the Cisco 7600 OSR:
•
Configuring the Gigabit Ethernet Interfaces, page 2-10
•
Configuring the POS Interfaces, page 2-10
•
Configuring the ATM Interfaces, page 2-11
•
Verifying and Saving the Layer 3 Interface Configuration, page 2-11
Configuring the Gigabit Ethernet Interfaces
The Layer 3 Gigabit Ethernet module WAN interfaces enable connections to
external Gigabit Ethernet networks.
This example shows a configuration dialog for a four-port GE WAN Gigabit
Interface Converter (GBIC) module. You should respond to the queries according
to your configuration requirements. Use your IP address and subnet mask in
responding to the setup prompts.
Configuring interface GigabitEthernet3/0:
Is this interface in use?: yes
Configure IP on this interface?: yes
Configure IP unnumbered on this interface?: no
IP address for this interface: 2.2.1.1
Number of bits in subnet field: 0
Class A network is 2.0.0.0, 0 subnet bits; mask is 255.0.0.0
Configure CLNS on this interface?: yes
For complete Gigabit Ethernet interface configuration information, refer to the
Cisco 7600 Optical Services Router Software Configuration Guide.
Configuring the POS Interfaces
The POS module interfaces enable connections to external OC-3/STM-1 or
OC-12/STM-4 networks.
This example shows a configuration dialog for an OC-3c POS module. You should
respond to the queries according to your configuration requirements. Use your IP
address and subnet mask when responding to the setup prompts.
Configuring interface POS4/0:
Is this interface in use?: yes
Configure IP on this interface?: yes
Configure IP unnumbered on this interface?: no
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IP address for this interface: 2.1.1.1
Number of bits in subnet field: 0
Class A network is 2.0.0.0, 0 subnet bits; mask is 255.0.0.0
Configure CLNS on this interface?: yes
Note
For POS interfaces, the cyclic redundancy check (CRC) is 32 bits by default.
For complete POS interface configuration information, refer to the Cisco 7600
Optical Services Router Software Configuration Guide.
Configuring the ATM Interfaces
You can connect to external ATM networks using ATM interfaces.
This example shows an ATM interface being configured to use IP. Respond to the
configuration dialog as appropriate for your configuration. Use your address and
subnet mask for the setup prompts.
Configuring interface parameters:
Configuring interface ATM1/0:
Is this interface in use?: yes
Configure IP on this interface?: yes
IP address for this interface: 1.1.1.2
Number of bits in subnet field: 0
Class A network is 1.0.0.0, 0 subnet bits; mask is 255.0.0.0
Note
You might have to establish additional configuration parameters for the
installed ATM modules if you want to fully utilize them. For more information
on configuring the ATM WAN modules, refer to the Cisco 7600 Optical
Services Router Software Configuration Guide.
Verifying and Saving the Layer 3 Interface Configuration
When you have completed entering the configuration information for all of the
installed modules, the following configuration query is displayed:
Use this configuration? [yes/no]:
At this point, verify all of the configuration parameters that are displayed on your
console terminal.
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Answer yes if you want to save the running configuration file to NVRAM and
display the following additional output:
Use this configuration? [yes/no]: yes
[OK]
Use the enabled mode 'configure' command to modify this configuration.
Press RETURN to get started!
After you press Return, the system reverts to the user EXEC prompt:
Router>
Answer no to the configuration query to return to the privileged EXEC mode
prompt (Router#). You must reenter the setup command and enter the appropriate
modules configuration information.
When you complete this procedure, you have manually configured the global
system parameters and the network interface parameters using the setup facility
or the setup command. Your Gigabit Ethernet, POS, and ATM interfaces are now
available for limited use.
If you want to modify the currently saved configuration information (after you
complete the preceding procedure), enter the setup command at the privileged
EXEC mode prompt (Router#) at any time.
To perform more complex configuration tasks, you can enter the configure
command at the privileged EXEC mode prompt (Router#), which establishes the
global configuration mode [Router(config)#]. This mode is described in the
“Using the Global Configuration Mode” section on page 2-14.
Checking the IOS Software Version Number and the Installed
Interfaces
To determine the current Cisco IOS software version running on the MSFC2 in
the Cisco 7600 OSR, enter the show version command at the user EXEC prompt
(Router>).
This command displays the Cisco IOS version number and other information,
including the hardware installed in the system, the names and sources of system
image files, and the contents of the software configuration register.
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When you enter the show version command, the following typical display
appears:
Router# show version
Cisco Internetwork Operating System Software
IOS (tm) MSFC2 Software (C6MSFC2-JSV-M), Version 12.1(5b)E7, EARLY
DEPLOYMENT RELEASE SOFTWARE (fc1)
TAC Support:http://www.cisco.com/cgi-bin/ibld/view.pl?i=support
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Fri 09-Feb-01 19:28 by hqluong
Image text-base:0x30008980, data-base:0x3177A000
ROM:System Bootstrap, Version 12.1(3r)E2, RELEASE SOFTWARE (fc1)
BOOTFLASH:MSFC2 Software (C6MSFC2-BOOT-M), Version 12.1(5b)E7, EARLY
DEPLOYMENT RELEASE SOFTWARE (fc1)
cat6k-msfc uptime is 3 minutes
System returned to ROM by power-on
Running default software
cisco Cat6k-MSFC2 (R7000) processor with 491520K/32768K bytes of
memory.
Processor board ID SAD044407E3
R7000 CPU at 300Mhz, Implementation 39, Rev 2.1, 256KB L2, 1024KB L3
Cache
Last reset from power-on
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
1 POS controller (4 POS).
1 Virtual Ethernet/IEEE 802.3 interface(s)
4 Packet over SONET network interface(s)
509K bytes of non-volatile configuration memory.
16384K bytes of Flash internal SIMM (Sector size 512K).
Configuration register is 0x2102
Router#
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Using the Global Configuration Mode
Using the Global Configuration Mode
If you prefer not to use the interactive script of the setup facility, you can manually
configure the Cisco 7600 OSR using the global configuration mode. The global
configuration mode enables you to enter configuration commands on a
line-by-line basis from the console terminal.
To configure your router using the configuration mode, perform these steps:
Step 1
Connect a console terminal to the console port.
Step 2
When asked if you want to enter the initial dialog, answer no. This causes the
router to enter the user EXEC mode. After a few seconds, the user EXEC mode
prompt (Router>) appears:
Would you like to enter the initial dialog? [yes]: no
Router>
At this prompt, enter the enable command to establish the privileged EXEC
mode:
Router> enable
Router#
Note
Step 3
Configuration changes can be made only in the privileged EXEC
mode.
At the privileged EXEC mode prompt, enter the configure terminal command to
enter the global configuration mode:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
At the global configuration mode prompt, enter the interface command to enter
the interface configuration mode:
Router(config)# interface gigabitEthernet 5/1
Router(config-if)#
In either the global configuration mode or the interface configuration mode, you
can change the router configuration parameters.
To exit either mode, type Ctrl-Z.
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Verifying the Running Configuration Settings
Step 4
Save your configuration settings, as described in the “Saving the Running
Configuration Settings to NVRAM” section on page 2-19.
Your router is now minimally configured and able to boot using the currently
established configuration information.
To display a list of the configuration commands available to you, enter a question
mark (?) at the global configuration mode prompt (Router (config)#).
Verifying the Running Configuration Settings
You may want to verify the running configuration settings or any changes made
to the running configuration settings before they are saved. To do so, enter the
show running-config command at the privileged EXEC mode prompt.
Typical output from this command is shown in the following sections:
•
Example of Running Configuration Settings for a Gigabit Ethernet WAN
Interface, page 2-15
•
Example of Running Configuration Settings for an OC-3 POS Interface,
page 2-16
•
Example of Running Configuration Settings for OC-12 POS Interface,
page 2-17
•
Example of Running Configuration Settings for OC-12 ATM Interface,
page 2-18
Example of Running Configuration Settings for a Gigabit Ethernet
WAN Interface
The show running-config command typically displays the following output for
an OC-3c/STM-1c POS interface installed in slot 7:
Router# show running-config
Building configuration...
Current configuration :2381 bytes
!
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version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router
!
!
interface GigabitEthernet5/1
no ip address
shutdown
no negotiation auto
no cdp enable
!
interface GigabitEthernet5/2
description b2b connection to osr1(g7/2)
ip address 1.5.0.2 255.255.0.0
no keepalive
no negotiation auto
no cdp enable
!
!
line con 0
exec-timeout 0 0
transport input none
line vty 0 4
login
!
end
Router#
Example of Running Configuration Settings for an OC-3 POS
Interface
The show running-config command typically displays the following output for
an OC-3c/STM-1c POS interface installed in slot 7:
Router# show running-config
Building configuration...
Current configuration:
!
version 12.1
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no service pad
no service udp-small-servers
no service tcp-small-servers
!
hostname Router
!
enable secret 5 $1$W6K5$W/p5Bq6IPLGJ/hS9VVP1g.
enable password lab
interface POS7/0
ip address 11.1.1.1 255.255.255.0
crc 32
clock source internal
!
interface POS7/1
no ip address
no ip route-cache cef
no ip route-cache
shutdown
crc 32
!
interface POS7/2
no ip address
no ip route-cache cef
no ip route-cache
shutdown
crc 32
!
interface POS7/3
no ip address
no ip route-cache cef
no ip route-cache
shutdown
crc 32
!
Example of Running Configuration Settings for OC-12 POS
Interface
The show running-config command typically displays the following output for
an OC-12 POS interface installed in slot 6:
Router# show running-config
Building configuration...
Current configuration:
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!
version 12.1.
no service pad
no service udp-small-servers
no service tcp-small-servers
!
hostname Router
-----------!
enable password lab
!
no ip domain-lookup
ip host ray 172.27.136.253
ip host crusty 171.69.209.28
!
!
interface POS6/0
ip address 12.1.1.1 255.255.255.0
crc 32
!
Example of Running Configuration Settings for OC-12 ATM
Interface
The show running-config command typically displays the following output for
an OC-12 ATM interface installed in slot 6:
Router# show running-config
Building configuration...
Current configuration:
!
version 12.1
no service pad
no service udp-small-servers
no service tcp-small-servers
!
hostname Router
-------------!
enable password lab
!
no ip domain-lookup
ip host ray 172.27.136.253
ip host crusty 171.69.209.28
!
!
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interface POS6/0
ip address 12.1.1.1 255.255.255.0
crc 32
!
Saving the Running Configuration Settings to NVRAM
To save the running configuration settings to NVRAM, enter the following
command at the privileged EXEC mode prompt (Router#):
Router# copy running-config startup-config
As an alternative, you can also use the following command to save the running
configuration settings:
Router# write memory
Either command saves to NVRAM the configuration settings that you created
while in the global configuration mode.
If you fail to take this step, your configuration settings will be lost the next time
you reload the system.
Reviewing the Running Configuration Settings
To display the running configuration settings stored in NVRAM, enter the show
startup-config command at the privileged EXEC mode prompt. This command
displays the following output:
Router# show startup-config
Using 1133 out of 520184 bytes
!
version 12.1
no service udp-small-servers
no service tcp-small-servers
!
hostname Router
!
enable password wilma
ip cef distributed switch
ip host biff 3.3.3.254
!
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interface POS3/0
ip address 2.1.1.1 255.0.0.0
no keepalive
crc 16
no cdp enable
!
interface POS3/1
ip address 2.1.1.2 255.0.0.0
no keepalive
crc 16
no cdp enable
!
interface POS3/2
ip address 2.1.1.3 255.0.0.0
no keepalive
crc 32
no cdp enable
!
interface POS3/3
ip address 2.1.1.4 255.0.0.0
no keepalive
crc 32
no cdp enable
!
interface GigabitEthernet5/1
no ip address
shutdown
no negotiation auto
no cdp enable
!
interface GigabitEthernet5/2
description b2b connection to osr1(g7/2)
ip address 1.5.0.2 255.255.0.0
no keepalive
no negotiation auto
no cdp enable
!
interface ATM4/0
ip address 15.0.0.15 255.0.0.0 secondary
ip address 1.1.1.2 255.0.0.0
atm pvc 1 0 64 aal5snap
atm pvc 2 0 72 aal5mux ip 155000 155000 1
atm pvc 3 1 90 aal5snap 312000 312000 1
atm pvc 4 0 108 aal5snap
atm pvc 10 0 144 aal5mux ip 155000 155000 1
atm pvc 11 1 91 aal5snap 310000 310000 1
map-group atm1
!
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no ip classless
ip route 2.5.4.254 255.255.255.255 Ethernet0
!
map-list atm1
ip 1.1.1.1 atm-vc 1
ip 1.1.1.3 atm-vc 2
ip 1.1.1.4 atm-vc 4
ip 15.0.0.1 atm-vc 3
ip 15.0.0.5 atm-vc 10
ip 15.0.0.6 atm-vc 11
no logging trap
!
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
password bambam
login
!
end
Performing Other Configuration Tasks
This section describes the procedures for performing these additional
configuration tasks:
•
Configuring the Software Configuration Register, page 2-22
•
Recovering a Lost Password, page 2-26
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Configuring the Software Configuration Register
The software configuration register is a 16-bit register in NVRAM that you use to
define specific system parameters.You can set or change the contents of this
register to accomplish these tasks:
•
Define boot sources for the default Cisco IOS software, assigning them in the
following order of precedence:
– Flash memory card inserted in PCMCIA slot 0
– TFTP server in the network
– Flash memory SIMM (NVRAM) on the GRP
– Boot image stored within the operating environment, which you access
by means of an appropriate form of the boot command issued at the ROM
monitor prompt (rommon>)
•
Define a default boot filename.
•
Enable or disable the Break function.
•
Control broadcast addresses.
•
Set the console terminal baud rate.
•
Recover a lost password.
•
Force an automatic boot using a boot image.
•
Read boot system commands from the configuration file stored in NVRAM.
The factory default value for the software configuration register is 0x0102.
This value is a combination of the following: binary bit 8 = 0x0100 and binary
bits 00 through 03 = 0x0002.
Caution
To avoid confusion, note that valid software configuration register values may
be combinations of settings. For example, the factory default value 0x0102 for
the software configuration register is actually a composite of settings in this
register.
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Configuring Boot Field Settings and Using the Boot Command
The four low-order bits of the software configuration register (bits 3, 2, 1, and 0)
form a boot field that defines the source of a Cisco IOS software image for booting
the Cisco 7600 OSR.
You can set or change the contents of the boot field by entering the config-register
command at the global configuration mode prompt [Router(config)#].
The factory default setting for the software configuration register is 0x0102.
When the boot field is set to either 0 or 1 (0-0-0-0 or 0-0-0-1), the system ignores
any boot instructions in the system configuration file and one of the following
occurs, depending on the boot field setting:
•
When the boot field is set to 0, you must boot the system manually by entering
the boot command at the ROM monitor prompt (rommon>). You can enter the
boot command with or without arguments.
If you enter the boot command without an argument (that is, without
specifying a file or any other boot instructions), the system automatically
boots using the default image in the Flash memory SIMM.
If you enter the boot command with arguments (that is, by instructing the
system to boot from a specific source), these options are available to you:
– You can instruct the system to boot from a specific Flash SIMM image
(by entering the boot system flash filename command), or you can
instruct the system to boot from a specific image stored on a PCMCIA
Flash memory card.
– You can instruct the system to boot from a network TFTP server either
by sending broadcast TFTP requests (by entering a boot system filename
command), or by sending a direct request to a specific network TFTP
server (by issuing a boot system filename ip-address command).
•
When the boot field is set to 1, the system automatically boots using the first
image found in the onboard Flash SIMM.
If you set the boot field to any bit pattern other than 0 or 1, the router uses the
software configuration register settings to create a filename from which to boot a
default system image stored on a network TFTP server.
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To create this filename, the system starts with the name cisco and links the octal
equivalent of the boot field value and the processor type in this format:
cisco<bootfieldvalue>-<processorname>
If the configuration file contains boot instructions, the system uses these
instructions to boot the system instead of using the filename it created from the
software configuration register settings.
Note
If a bootable Cisco IOS software image exists in a Flash memory card inserted
in PCMCIA slot 0 or slot 1, the software configuration register boot field
setting is overridden and the system boots from the Cisco IOS software image
in the Flash memory card, instead of from a network TFTP image.
Changing the Software Configuration Register Settings
To change the software configuration register settings while running system
software, perform these steps:
Step 1
Enter the enable command and your password at the user EXEC mode prompt to
establish the privileged EXEC mode:
Router> enable
Password:
Router#
Step 2
Enter the configure terminal command at the privileged EXEC mode prompt to
establish the global configuration mode:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 3
Set the contents of the software configuration register by entering the
config-register value command at the global configuration mode prompt, where
value is a hexadecimal number preceded by 0x.
The config-register value command takes this form:
Router(config)# config-register 0xvalue
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Step 4
Exit the global configuration mode by pressing Ctrl-Z or entering the end
command:
Router(config)# config-register 0xvalue
Router(config)# end
Router#
The new contents of the software configuration register are saved to NVRAM.
These new settings do not take effect until you reload the system or reboot the
router.
Step 5
To display the software configuration register setting that is currently in effect as
a result of Step 3 (and which will be used at the next reboot of the router), enter
the show version command at the privileged EXEC mode prompt:
Router# show version
.
.
.
#Configuration register is 0x141 (will be 0x102 at next reload)
The last line of the display shows both the current configuration register setting
and the new setting that will take effect when the system is reloaded or rebooted.
Step 6
Save the software configuration register setting, as described in the “Saving the
Running Configuration Settings to NVRAM” section on page 2-19.
Step 7
Reboot the router.
The software configuration register setting takes effect only after you reload the
system, such as when you enter the reload command from the console or reboot
the router.
This completes the procedure for changing the contents of the software
configuration register. You can set the boot field to enable any desired manual or
automatic boot function.
Setting the Boot Field Bits in the Software Configuration Register
The four low-order bits in the software configuration register (bits 3, 2, 1, and 0)
comprise the boot field. This field specifies a number in binary form.
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If you set the boot field value to 0, you must boot the system manually by entering
the boot command at the ROM monitor prompt (rommon>).
If you set the boot field value to 0x2 through 0xF and a valid boot system
command is stored in the configuration file, the system boots the Cisco IOS
software image as directed by that value. If no boot system command is present
in the configuration file, the system computes a default boot filename for booting
from a network TFTP server.
In the following example, the software configuration register has been set to boot
the system from the Flash memory SIMM and to ignore the Break function at the
next reboot of the router:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# config-register 0x0102
Router(config)# boot system flash [filename]
Crtl-z
Router#
With the configuration register set to “0x0102,” the system creates a default boot
filename. In forming this filename, the system starts with the name cisco and
appends the octal equivalent of the boot field number, a hyphen, and the processor
type.
Recovering a Lost Password
This section tells you how to recover a lost password.
Note
If the enable password is encrypted, the following procedure will not work for
password recovery and you will have to reconfigure the system before
attempting a reboot. To reconfigure the system, use the displayed
configuration obtained by entering the show startup-config command in the
privileged EXEC mode.
To recover a lost password, perform these steps:
Step 1
Attach an ASCII terminal to the console port.
Step 2
Configure the terminal to operate at 9600 baud, 8 data bits, no parity, and 2 stop
bits (or to whatever settings the console port is currently set).
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Step 3
Enter the show version command at the privileged EXEC mode prompt to display
the current software configuration register setting:
Router# show version
.
.
.
Make a note of this current configuration setting, as displayed in the last line of
the show version command output. You may need this value for later use.
Step 4
If the Break function is disabled, power cycle the router by turning off power to
the power supply, waiting 5 seconds, and then restoring power.
If the Break function is enabled, press the Break key or send a break signal by
holding down the Ctrl key and pressing the right square bracket key (^]).
Step 5
Within 5 seconds of power being restored to the router, press the Break key. This
action causes the terminal to display the ROM monitor prompt, as follows:
rommon 1>
Step 6
Change the software configuration register setting to 0x0040. This setting causes
the system to ignore the contents of NVRAM, allowing you to see your password.
Step 7
Initialize the router by entering the initialize command at the ROM monitor
prompt:
rommon 1> initialize
The router power cycles, the software configuration register is set to ignore the
configuration file, and the router boots the system image and displays the system
configuration dialog:
--- System Configuration Dialog --.
.
.
Step 8
Enter no in response to the system configuration dialog prompts until the
following instruction is displayed:
Press RETURN to get started!
Step 9
Press Return.
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After the interface configuration information is displayed, the user EXEC mode
prompt appears:
Router>
Step 10
Enter the enable command at the user EXEC mode prompt to enter the privileged
EXEC mode:
Router> enable
Router#
Step 11
Enter the show start-up config command at the privileged EXEC mode prompt
to display the enable password in the configuration file:
Router# show start-up config
.
.
.
Step 12
Enter the configure terminal command at the privileged EXEC mode prompt to
enter the global configuration mode:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#
Step 13
Change the software configuration register setting back to its original value.
Alternatively, change this value to 0x0102 (the factory default) by entering the
config-register value command:
Router(config)# config-register 0xvalue
Router(config)#
Step 14
Exit the global configuration mode by pressing Ctrl-Z or entering the end
command.
Router(config)# end
Router#
Step 15
Reboot the router and enable it using the recovered password.
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